Mirrors & reflection
Turn a beam around an obstacle by changing a mirror’s angle.
Let the light find a way.
A light bending puzzle game in forgotten halls. Turn the instruments. Awaken the stone.
0 / 12 discovered
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Three turns · focus · red
✓The silent gate
OPTICAL BENCH
Follow the light
Beautiful. You found a way.
Every receiver has the light it needs.
Drag to move Drag the round handle to rotate
Choose a tool, then use arrow keys to move or Q and E to rotate. Hold Shift for finer steps. Undo with Control or Command Z. Select a tool below to reach the same controls without dragging.
Simple tools. Surprising combinations.
Learn reflection, refraction, and prism dispersion by moving things around. The light gives you the answer.
Lenses & focus
Bring a wide beam together or spread it across a larger area.
Prisms & dispersion
Refract white light and discover the different colors within it.
Splitters, filters & apertures
Divide energy, select colors, and decide where light is allowed to go.
For the joy of figuring it out.
Prism Riddle is a browser-based physics puzzle game about arranging optical tools. There is no timer and no single correct layout. Try an idea, watch the light, and follow what you discover.
Looking for games like Prism Rules?
If you enjoy experimenting with light in Prism Rules, try these twelve original puzzles and the free lab. Prism Riddle is an independent game with its own levels. It is not affiliated with or endorsed by Prism Rules.
Prism Rules ↗How do I play?
Drag a tool into the light. Select it and turn its round handle, or use the angle slider. Light every receiver to the stated energy and color requirements. Crossed receivers must stay dark. Hints are always available.
Will my progress be saved?
Your completed experiments and puzzle layouts are saved in this browser on this device. No account is needed. Clearing browser storage also clears your progress.
How does the light simulation work?
A finite-width beam is sampled across 27 wavelengths. Mirrors reflect, prisms refract, and lenses use a thin-lens approximation. Splitters divide energy and filters absorb unwanted wavelengths. This is a geometric optics playground; interference, diffraction and polarization are not simulated.